47993689 has 4 divisors (see below), whose sum is σ = 48311680. Its totient is φ = 47675700.

The previous prime is 47993623. The next prime is 47993713. The reversal of 47993689 is 98639974.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98639974 = 2 ⋅49319987.

It is a cyclic number.

It is not a de Polignac number, because 47993689 - 2¹¹ = 47991641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47993389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158769 + ... + 159070.

It is an arithmetic number, because the mean of its divisors is an integer number (12077920).

Almost surely, 2^47993689 is an apocalyptic number.

It is an amenable number.

47993689 is a deficient number, since it is larger than the sum of its proper divisors (317991).

47993689 is a wasteful number, since it uses less digits than its factorization.

47993689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317990.

The product of its digits is 2939328, while the sum is 55.

The square root of 47993689 is about 6927.7477581101. The cubic root of 47993689 is about 363.4081903016.

The spelling of 47993689 in words is "forty-seven million, nine hundred ninety-three thousand, six hundred eighty-nine".